. >> explain what does that look like in a physics claft f s cla? >> they're working at their own place. when you go to physic class, the teacher might get a dashboard. let me do a foe does intervention or, hey, sal's having trouble with it. fareed knows it let me pair them up and if i get really excited about astro physics, i can go degree deep. there's no such thing as missing class anymore because the students are working at their own pace and the teacher's there to mentor them. >> so it's highly customized in a sense. >> the whole reason why we have this kind of assembly line model of education that we inherited from the product shanns, they're the first people, very egalitarian motive. how do you educate everyone. 300 years ago not even got id indicated. as soon as you say you want to educate everyone, put them on batches, on an assembly line. throw information on them. you tear going to have good product. you're going to have bad product. you have tools that can leverage the physical classroom. >> do you imagine in your most ambitious moments